Does anyone on the board have a boosted b16/b20? Im curious because my bro has a b16a head and b20 bottom and just wanted to know just incase he plans on boosting it...Thank you
-David

 

stay around 8, but tuned right I've seen B18's and H22's take 10-15 and some cats bug out and go higher but they know the risk but are just willing to take it. For yours stay around 8, but stock B20 blocks have pretty weak sleeves so dont push it, they werent built for performance so becareful if its a stock block.

 

General guidelines are:

MAP sensor - limited to 11psi
head gasket - limits to 15psi

 

You should post in the forced induction forum

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">General guidelines are:

MAP sensor - limited to 11psi
head gasket - limits to 15psi</TD></TR></TABLE>

I read that somewhere or something similar to that. hmmmm...

 

So, I know the b20 block isn't made to be a racing block. But if built it couldn't it be better then a b18? Just wondering.

 

The head gasket is a little more subject to questionability, but the MAP sensor will only tolerate so much manifold pressure before it exceeds the maximum voltage and triggers a fuel cut and CEL code.

 

thank for all the help...i might be boosting it after all...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WTBCivicVx &raquo;</TD></TR><TR><TD CLASS="quote">Does anyone on the board have a boosted b16/b20? Im curious because my bro has a b16a head and b20 bottom and just wanted to know just incase he plans on boosting it...Thank you
-David</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WTBCivicVx &raquo;</TD></TR><TR><TD CLASS="quote">thank for all the help...i might be boosting it after all...</TD></TR></TABLE>

So who owns this engine? I'd say stay at 8 PSI without some good engine management.

 

I'm boosting 8 PSI and won't be going any higher until I sleeve it and get pistons / rods. My buddy was running a straight B20Z with pistons / rods and went to 11.5 PSI. Bad move... He split all 4 cylinders.

Another guys I know (this is a hard luck story) was doing dyno pulls and his boost controller failed so he spiked 24 PSI and almost lost it off the dyno. Needless to say he split all 4 as well.

If you're going to boost a B20 / B16 VTEC make sure you have a good EMS (I'm using the Hondata S200B) and Boost controller (Apexi AVC-R). As well, stay clear of internal WG on the turbo, they stick. That's something you don't want happening on a B20. Spend the money and get a Tial.

 

Is the motor already built? or is this something your doing? if it's a b20/vtec (LS/vtec) make sure it's done right, other wise it'll blow up on you. They are a little touchy if not done right and get rev'd to high.

 

try not to go by psi, 7 psi on a small turbo will produce much less horsepower then 7psi on a big turbo. with that in mind there are ppl running 300hp on stock sleeves some r running even more, tunning is important.

 

7 to 9 depends on comp. ratio too

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SickoneLS &raquo;</TD></TR><TR><TD CLASS="quote">7 to 9 depends on comp. ratio too</TD></TR></TABLE>

Absolutly! Stock bottom end on a B20B is 8.6:1. On the B20Z its 9.0:1. Anybody got the math on the difference in boost pressures to yeild the same result?

w.r.t. the max RPM mine cuts at 7500....

 

what if you go with a miising link for the map sensor that means u can go higher on the boost right

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">General guidelines are:

MAP sensor - limited to 11psi
head gasket - limits to 15psi</TD></TR></TABLE>

Stock head gaskets are the best head gaskets you can buy, they can handle 30lbs easy. The factory MAP will only read to 11.2psi (.75 bar).

I'd run about 8lbs on that setup, those b20 sleeves are a little thin.